Zcoin 0.13.7.2

Instructions

Important Upgrade

Please backup your wallet before upgrading to this version. To do this, navigate to File > Backup Wallet and save the file to a secure location.

For Users

Client versions older than 0.13.7.1 will stop working with the hard fork. Please upgrade your clients before December 10th.
As 0.13.7.2 contains many stability improvements it is recommended to upgrade even if you're on 13.7.1.

For Znode owners

If you do not upgrade your Znode, you will stop receiving rewards after the hard fork. In order to keep receiving rewards, please upgrade your Znode to 0.13.7.2 or higher, at any point in time between now and December 10th.

A new Znode start should not be required.

For guidance on how to upgrade your Znode, please refer to: https://zcoin.io/znode-upgrade-guide/

Please update pools before December 10th 2018.

Changelog

• MTP hardfork date maintained on 2018 December 10th 12:00 UTC
• Improved Znode stability with saving of Znodes in cache
• Allow mining only when Znode winner is known
• Added MTP unit tests
• Exodus is disabled by default and clean ups.
• Fixed a rare crash when reindexing with unconfirmed Zerocoin spends in wallet
• Other minor bug fixes

Binaries

• Version: v0.13.7.2
• SHA256 Hashes:
  • Windows Installer: 2119bc03cc43550c099ece53a0aafbcd57016d83ec96df49099437228bf412bf
  • Windows exe: 863ece260228bfc5584e53a2ae311f1e32fbf4f8b9e40bf1f651fb9f1383ed2a
  • Linux: 920553e26187f15715385678488034a29d2e6d664863d9c6bb1cacde82642fe9
  • macOS: a5d10167725d6ebcaaa5abf1726232bfcda0db699e0797cf59cda233ad6d4046

Zcoin 0.13.7.1 MTP

Instructions

Mandatory Upgrade

Please backup your wallet before upgrading to this version. To do this, navigate to File > Backup Wallet and save the file to a secure location.

We will likely publish an in-between maintenance release to improve Znode reliability and streamline Exodus code.

If you are not keen on doing another upgrade before December, you can put it off for a while.

For Users

Client versions older than 0.13.7.1 will stop working with the hard fork. Please upgrade your clients before December 10th.

For Znode owners

If you do not upgrade your Znode, you will stop receiving rewards after the hard fork. In order to keep receiving rewards, please upgrade your Znode to 0.13.7.1 or higher, at any point in time between now and December 10th.

A new Znode start should not be required.

For guidance on how to upgrade your Znode, please refer to: https://zcoin.io/znode-upgrade-guide/

Miners and Pools

We welcome development of miners for the MTP algorithm. djm34 has come up with some reference ccminer for Nvidia and is in the process of releasing CPUminer code.

JCThePants from Mintpond has done some amazing work in implementing a MTP reference stratum, a simple node hasher and verifier and a BOS serializer library and Jansson fork. He is also running the first MTP pool on testnet!

Please update pools before December 10th 2018.

Changelog

• MTP hardfork date confirmed on 2018 December 10th 12:00 UTC
• Enables the ability to do multiple Zerocoin mints from a single input after hard fork date.
• Adds a 2 factor authentication for dumpwallet and dumpprivkey commands due to scammers using it to cheat people to give them their private keys as discussed in #290.

Binaries

• Version: v0.13.7.1
• SHA256 Hashes:
  • Windows Installer: 43981fe89ddef6597ae0c0ecea88e14594b73accbe399a278c8869f8f8679323
  • Windows exe: 02a92bf0c6ffbe554476f5eb1c504d6b0aac787607791849a93b28bf2be1f263
  • Linux: 73f55d6394566a01a628be966c2f4389805d0a42cd9502d51fd3d22910f1487a
  • macOS: 451a4d0111cc4537456ebb2def5442852c9d4af18d5982206dd2b92f5d627ab0

Zcoin "French Drop" 0.13.6.9

Instructions

Optional upgrade intended to further reduce Dandelion logging intensity.

Changelog

• Further reduction of Dandelion logging

Binaries

• Version: v0.13.6.9 - SHA256 Hashes:
  • Windows Installer: 4a4c2c325e46ef296161024496094b123e0b555c8c1b15094fbd5e873aff9d82
  • Windows exe: 68065dd62c9d23bf7b46b98934123778b4e78f1c38783e82562d94977a3786f4
  • Linux: c5342f70686fe89ecf54258c5acee3ba206f9a7b7aead309a559521424a53276
  • macOS: e13647804df0d77ebddaaa818e256a560d7f6428e7cb3544435800edf14d02ce

Zcoin "French Drop" 0.13.6.8

Instructions

Optional upgrade if not using Exodus features.

Exodus is a port of Omni that acts as a smart contract layer that allows tokenization on top of Zcoin's blockchain and also can serve as a decentralized exchange for these custom tokens.

Exodus is a two layer solution that doesn't affect Zcoin consensus rules and 13.6.8 is an optional upgrade.

Exodus GUI elements are enabled by adding showExodusUi=1 to zcoin.conf (disabled by default).

Changelog

• Enables Exodus support
• Reduce Dandelion logging

Binaries

• Version: v0.13.6.8- SHA256 Hashes:
  • Windows Installer: 496fd28f4ca1315b9145e028dfe33803c6e05e57e8d6134a0a7c04519545b547
  • Windows exe: e21030d579b9670c6b10acd4241b5bafe94c17ca377a92b3c05d8d4ffdf06e76
  • Linux: 9ffaa2c944295ca0480e7f25785384d59e558c0fcbbfc67f67063fbf40ffd3da
  • macOS: 4f35f5a43f9243c249947ed945239046858b443cfa3067cf5594bd9e28145e3c

Zcoin "French Drop" 0.13.6.7

Instructions

Mandatory update

Upgrade before Block 107246.

This release incorporates Dandelion++ privacy enhancing routing also known as BIP156.

Read more about Zcoin's implementation of Dandelion++ here.

Changelog

• Dandelion transaction propagation
• Fixes bug on enforcement of Znode payee (comes into effect on Block 107246)
• Updated TOR

Binaries

• Version: v0.13.6.7- SHA256 Hashes:
  • Windows Installer: 626ea311c24ba8348fe1283382dfaa3cd890866835dfea19ba893723cb7bee08
  • Windows exe: 0e054ad64d31b913bb78d406de57ff9d0fb5f3334348f75cea25bbac7f2a0df4
  • Linux: 46a86c095a1823facb04822a0de8ceed22a5bcfe2ddd0b686e3c3633f069335f
  • Mac: cf01543017acc24708a1bfcf5ea1f0edcfac6363c009223eec5ce88d240e5836

Zcoin "French Drop" 0.13.6.6

Instructions

Mandatory update for Miners only
Optional but recommended update for Zcoin users, Znodes etc

This update resolves some rare occurrences where mining pools can have getblocktemplate broken when dealing with chain reorganization involving Zerocoin spends.

It also increases the limit of Zerocoin spends per block from 1 to 5.

Changelog

• Resolves getblocktemplate breaking in certain cases when chain reorg involving Zerocoin spends
• Increases Zerocoin spend limit to 5 per block.

Binaries

• Version: v0.13.6.6- SHA256 Hashes:
  • Windows Installer: 85D0378D6043C3269AA638C5458EAD4702C162012698F5951050B74F7CF6A409
  • Windows exe: 69E350F52D83CC59ECD9820793D546332A3160B8C509AF428BF5241863B2E507
  • Linux: 14EFEBA32DA30C9D4F936A84AF035E1405528D021D6B5E0E51647D0946C543C3
  • Mac: 77459C704DCD8AF74161F5810AC235520CDFBFD54465A782C5BA8D72B2B041D0

Zcoin "French Drop" v0.13.6.4

Instructions

Optional update.

This release is to allow users who generated Zerocoins using the command line and had their Zerocoin spends never confirmed.

If you have a Zerocoin spend that has not confirmed even after days, you can recover this by right clicking on the spend transactions in your Transaction list. Make sure to backup your wallet first by going to File>Backup Wallet.

Right click on the transaction
select “Abandon transaction”
Ifthe option is grayed out you might need to restart the client

If you have already abandoned the Zerocoin spend transaction there is a manual way. Head to Help>Debug Window>Console

Use listspendzerocoins command to find out coin serial in question
Then use setmintzerocoinstatus to mark coin as unspent

Changelog

• Allows users to abandon Zerocoin spend transactions that have not confirmed. and the mints will go back to being unused.
• Allows users who accidentally abandoned their Zerocoin spend transactions to allow them to respend.

Binaries

• Version: v0.13.6.4- SHA256 Hashes:
  • Windows: D626B2F7CA11BE20E025069758C947B3D35887EAA34050F65BF8D70BEDEE682F
  • Linux: BAB48B674DBA8FB40E9912E9B6123E93C2BACBC02BE8A0462F408A07530AF7BD
  • Mac: 64B72DF01181BABA905A2B7B1D7ADBD10BFE569DE5AAF0AFC02273624A27460E

Zcoin "French Drop" v0.13.6.3

Instructions

Highly recommended update (even for 13.6.1 and 13.6.2) for local wallets and mining pools. Alternative to updating will be a reindex. Mandatory upgrade for Znodes to avoid any disruptions (though you can stick to 13.6.2 if you perform a reindex).

Failure to update to 13.6.3 may result in stuck wallets which can be cured by a reindex though it will be easier to update to this version.

Before anything, backup your wallet.dat (File > Backup Wallet), ideally in a different drive.

Changelog

• Enables Zerocoin spend to third party feature
• Resolves database issues where wallets can be stuck on certain Zerocoin spends.
• Highly recommended update to avoid wallet stuck issues (alternative is to do a reindex)

Binaries

• Version: v0.13.6.3- SHA256 Hashes:
  • Windows: FEEA7A933E59752DD023D89110B84C6831405164FC88EF0BB2062B9A8EF7A88B
  • Windows installer: AE8798357A2F9878D26B6A05E0DF1006853E1B38F6BD3193FCDCE7118F484777
  • Linux: EF7991E2E4084E7F3E3EC8ACB61DF38E3DF05143F971A1868BFFEB761B28A059
  • Mac: 94A192D587BB8A22B87874293E28E93D28FA74337B24FDEC7C0C9CE3899D0125

Zcoin "French Drop" v0.13.6.2

Instructions

Mandatory upgrade from 13.6.1 for Znodes and mining pools and local wallets with Znodes. Failure to update may result in inconsistent Znode information/status/payouts.

Highly recommended update for exchange wallets or wallets without Znodes but not compulsory.

Before anything, backup your wallet.dat (File > Backup Wallet), ideally in a different drive.

When upgrading to this version from the 13.4 branch, it will prompt for a one time reindex (approximately 30-80 minutes). A typical 1 CPU VPS will take about 1 hour 15 minutes. If you are upgrading your Znodes, as long as upgrade is completed within 3 hours, you won't need to issue a znode start command and you won't lose your queue status.

If you are upgrading from 13.5, no reindex is required unless you are stuck on a block on which a reindex is required. Follow this guide on how to reindex.

Changelog

• Mandatory upgrade for Znodes, mining pools and local wallets with Znodes.
• Removes the need for local wallet to reissue Znode start_alias command after hard fork date.
• Hard fork block 89300 Update by May 28

Binaries

• Version: v0.13.6.2- SHA256 Hashes:
  • Windows: c870cc9b8b607f53178410818e5f888e7a5983d44efb7dd2d072e3a060855ae5
  • Windows installer: 7398bc3e2f2e10fe2676410d11a65733c86bf66b9a7162ad9b579651f1ec1506
  • Linux: 27e6d36a460ea70ecdfd646f6e1f1f2ff6925d41391cfdf8412b25a56d96b0e7
  • Mac: e0113461ab98bcefda5550cb8ce63a8ec26442d29e907ff21db9db456c1babed

Zcoin "French Drop" v0.13.6.1

Instructions

Mandatory upgrade (including pools, Znodes, exchanges, wallets) for all prior versions.

Before anything, backup your wallet.dat (File > Backup Wallet), ideally in a different drive.

When upgrading to this version from the 13.4 branch, it will prompt for a one time reindex (approximately 30-80 minutes). A typical 1 CPU VPS will take about 1 hour 15 minutes. If you are upgrading your Znodes, as long as upgrade is completed within 3 hours, you won't need to issue a znode start command and you won't lose your queue status.

If you are upgrading from 13.5, no reindex is required unless you are stuck on a block on which a reindex is required. Follow this guide on how to reindex.

Changelog

• Mandatory upgrade
• Security fixes
• Hard fork block 89300 (Current block height as of date of release is 87478) so approximately 12 days from date of release.

Binaries

• Version: v0.13.6.1- SHA256 Hashes:
  • Windows: BA0D4A08BD6FA1919A251E7DFA7C5B6A0B6D984C0EB1B7DA90EB3F192A1CB501
  • Windows installer: C3403AEB4C2FF01013C6DFE97721C8DFBEB4EC1C20281808575DF71EA5A69EC9
  • Linux: C1C48720E395E334F7A55AA824A7EF0C920DF902247E5AB61082FF78A07B8C46
  • Mac: C8F9C7A3D70C5B6CF8A7A3EA780AAC2BF70E3F4F3780029F373EDD2D40F975ED